/*
    GNU GENERAL LICENSE
    Copyright (C) 2006 The Lobo Project. Copyright (C) 2014 - 2016 Lobo Evolution

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    verion 3 of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General License for more details.

    You should have received a copy of the GNU General Public
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    

    Contact info: lobochief@users.sourceforge.net; ivan.difrancesco@yahoo.it
 */
package org.lobobrowser.html.renderer;

/**
 * The Class LineMargin.
 */
public class LineMargin {

    /** The clear x. */
    private final int clearX;

    /** The clear y. */
    private final int clearY;

    /** The next. */
    private final LineMargin next;

    /**
     * Instantiates a new line margin.
     *
     * @param next
     *            the next
     * @param cleary
     *            the cleary
     * @param totalXOffset
     *            the total x offset
     */
    public LineMargin(LineMargin next, int cleary, int totalXOffset) {
        super();
        this.next = next;
        this.clearY = cleary;
        this.clearX = totalXOffset;
    }

    /** Gets the clear y.
	 *
	 * @return the clear y
	 */
    public int getClearY() {
        return clearY;
    }

    /** Gets the next.
	 *
	 * @return the next
	 */
    public LineMargin getNext() {
        return next;
    }

    /** Gets the offset.
	 *
	 * @return the offset
	 */
    public int getOffset() {
        return clearX;
    }

    /*
     * (non-Javadoc)
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object other) {
        if (!(other instanceof LineMargin)) {
            return false;
        }
        LineMargin olm = (LineMargin) other;
        return (olm.clearX == this.clearX) && (olm.clearY == this.clearY)
                && org.lobobrowser.util.Objects.equals(olm.next, this.next);
    }

    /**
     * Translated.
     *
     * @param yoffset
     *            the yoffset
     * @param xoffset
     *            the xoffset
     * @return the line margin
     */
    public LineMargin translated(int yoffset, int xoffset) {
        int newClearY = this.clearY - yoffset;
        int newOffsetX = this.clearX - xoffset;
        if (newOffsetX < 0) {
            newOffsetX = 0;
        }
        LineMargin oldNext = this.next;
        LineMargin newNext = oldNext == null ? null : oldNext.translated(
                yoffset, xoffset);
        return new LineMargin(newNext, newClearY, newOffsetX);
    }
}
